We are honored to have one of our 300 Blackout upper receivers featured in the NRA American Rifleman's 'Three Awesome AR Uppers' review!

The AR-15's split personality allows a single lower assembly that has a standard size lower receiver to be connected to different uppers chambered in a variety of calibers. Here’s a closer look at how to make the most of a single lower and three quality uppers that span the small, medium and big-bore cartridge options for the AR platform...